/*******************************************************************************
 * Copyright 2017 Bstek
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.urule.model.function.impl;

import com.bstek.urule.Utils;
import com.bstek.urule.model.function.Argument;
import com.bstek.urule.model.function.FunctionDescriptor;
import com.bstek.urule.runtime.WorkingMemory;

import java.math.BigDecimal;

/**
 * @author Jacky.gao
 * @since 2015年7月31日
 */
public class ExpFunctionDescriptor implements FunctionDescriptor {
    private boolean disabled = false;

    @Override
    public Argument getArgument() {
        Argument arg = new Argument();
        arg.setName("对象");
        arg.setNeedProperty(true);
        return arg;
    }

    @Override
    public Object doFunction(Object object, String property, WorkingMemory workingMemory) {
        Object obj = Utils.getObjectProperty(object, property);
        BigDecimal bigobj = Utils.toBigDecimal(obj);
        return Math.exp(bigobj.doubleValue());
    }

    @Override
    public String getName() {
        return "Exp";
    }

    @Override
    public String getLabel() {
        return "求指数";
    }

    @Override
    public boolean isDisabled() {
        return disabled;
    }

    public void setDisabled(boolean disabled) {
        this.disabled = disabled;
    }
}
